Navigation Links
Chinese scientists reveal the genomic enigma of desert poplar
Date:11/25/2013

November 25, 2013, Shenzhen, China - In a collaborative study, researchers from Lanzhou University, BGI and other institutes have succeeded in unraveling the whole genome sequence of desert poplar, Populus euphratica, and the genetic bases underlying poplar to against salt stress. This work provides new insights for understanding the genetic basis of tree adaptation to salt stress and facilitating the genetic breeding of cultivated poplars for saline fields. The research results have been published online in Nature Communications.

Trees are the lungs of the earth for that they can fix CO2 - the major greenhouse gas - more efficiently. Forest trees rarely can grow in saline soils, but desert poplar is well-adapted to extreme desert environments and is an important species for studying the effects of salt stresses on trees. Notably, it maintains higher growth and photosynthetic rates than other poplar species at high salinity, and can survive concentrations of NaCl in nutrient solution up to 450mM. However, the knowledge of the genomic mechanisms of desert poplar under salt stress remains very limited.

Considering the limitation of next-generation sequencing for assembling complex genome and the high heterozygosity of desert poplar, researchers used a newly developed fosmid-pooling strategy to sequence and assemble the genome of this tree species. All the efforts yielded a high-quality genome sequence of desert poplar with high contiguity, coverage and accuracy, further demonstrating the feasibility of this fosmid-pooling approach for de novo sequencing and assembly of a complex heterozygous genome.

The genome of desert poplar is very similar to that of the closely related mesophytic congener, P. trichocarpa. Researchers investigated the differences between the two genomes and suggested that P. euphratica diverged from P. trichocarpa within the last 8 to 14 million years. Although both species shared at least two whole-genome duplication (WGDs) and exhibited extensive collinearity across the gene space, species-specific genes involved in stress tolerance, such as "ion transport", "ATPase activity", "transcript factor activity" and "oxidoreductase activity", were selectively expanded and/or positively selected in the P. euphratica genome.

When studying the adaptation mechanisms to against salt stress, researchers found that several gene families likely to be involved in tolerance to salt stress contain significantly more gene copies in the P. euphratica lineage. They also compared the P. euphratica in response to salt stress with salt-sensitive poplar (P. tomentosa), and found some genes involved in ion transport and homeostasis, such as NhaD1, KUP3 and NCL, were distinctly upregulated under salt stress.

"The complete genome sequencing of desert poplar revealed the underlying genetic mechanisms of poplar to against salt stress, laying a solid foundation for accelerating the genetic breeding of cultivated poplars for saline and desert fields." said Junyi Wang, Project Manager at BGI, "Our work also demonstrate that trans-omic approach to study salt-tolerant plants is applicable on both herbaceous plant and woody plant, providing new insights into the comprehensive understanding of plants' salt tolerance and drought resistance."


'/>"/>

Contact: Jia Liu
liujia@genomics.cn
BGI Shenzhen
Source:Eurekalert

Related biology news :

1. Mainz University collaborates with 3 Chinese universities in research and teaching
2. New SARS-like coronavirus discovered in Chinese horseshoe bats
3. Novel Chinese herbal medicine JSK improves spinal cord injury outcomes in rats
4. Whole-genome sequencing uncovers the mysteries of the endangered Chinese alligator
5. Unique US-Chinese lab to head off H7N9 outbreak and future threats
6. Chinese foreign fisheries catch 12 times more than reported: UBC research
7. NJIT and Chinese Tech Institute join forces for 2013 Solar Decathlon in China
8. The first genome sequence of Chinese plum provides important resource for fruit improvement
9. Chinese scientists discover evidence of giant pandas population history and local adaptation
10. Chinese scientists discover MVK mutations associated with DSAP
11. Chinese scientists successfully crack the genome of diploid cotton
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/20/2016)... , June 20, 2016 Securus Technologies, ... technology solutions for public safety, investigation, corrections and ... prisons involved, it has secured the final acceptance ... facilities for Managed Access Systems (MAS) installed. Furthermore, ... facilities to be installed by October, 2016. MAS ...
(Date:6/15/2016)... June 15, 2016 Transparency ... titled "Gesture Recognition Market by Application Market - Global Industry Analysis ... 2024". According to the report, the  global gesture recognition ... 2015 and is estimated to grow at a ... by 2024.  Increasing application of gesture ...
(Date:6/9/2016)... -- Paris Police Prefecture ... to ensure the safety of people and operations in several ... tournament Teleste, an international technology group specialised in ... that its video security solution will be utilised by ... safety across the country. The system roll-out is scheduled for ...
Breaking Biology News(10 mins):
(Date:6/24/2016)... ... June 24, 2016 , ... Researchers at the Universita Politecnica delle ... people with peritoneal or pleural mesothelioma. Their findings are the subject of a new ... , Diagnostic biomarkers are signposts in the blood, lung fluid or tissue of mesothelioma ...
(Date:6/23/2016)... 2016 A person commits a crime, and the ... track the criminal down. An outbreak of foodborne ... Administration (FDA) uses DNA evidence to track down the bacteria ... far-fetched? It,s not. The FDA has increasingly used a complex, ... foodborne illnesses. Put as simply as possible, whole genome sequencing ...
(Date:6/23/2016)... June 23, 2016   EpiBiome , a precision ... million in debt financing from Silicon Valley Bank (SVB). ... and to advance its drug development efforts, as well ... "SVB has been an incredible strategic partner ... a traditional bank would provide," said Dr. Aeron ...
(Date:6/23/2016)... Calif. , June 23, 2016  Blueprint Bio, ... biological discoveries to the medical community, has closed its ... Matthew Nunez . "We have received ... with the capital we need to meet our current ... essentially provide us the runway to complete validation on ...
Breaking Biology Technology: